I see an issue with the 2.4ghz. Once you start a continuous 1mbit+ transfer from 2.4ghz to LAN, packets are dropped but only on traffic coming in/out of 2.4ghz devices. Everything else is working as expected and 1300 is powered off. Channel selection is not allowed on this model, so its been stuck on Channel 5, even though it should be set to automatic selection.

A different channel might change the behavior, so instead a (DIR-879) was tested on the same channel 5 with the same number of devices connected. The results were identical, packets were being dropped once load is applied onto the 2.4ghz medium. However, as soon as the channel is set to 3, packet lost dropped to 1-4 % range.

If I can change the channel on the COVR, then maybe we can figure out if this is wireless interference or a buggy firmware.